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The Cocoon Nebula (IC 5146) is an emission nebula found in the constellation Cygnus (the Swan). It has a magnitude of 7.0 and a size of 12 arc-minutes.
The image above was taken with the 12" LX200, AO7, and ST-8E camera at f/6.3 on Aug 13 2004 at the Mistletoe Observatory. It is an RGB image (as detailed below) with a total exposure time of 2 hrs 20 min. Calibration and alignment were done in MaxIm DL. Final processing was done with Photoshop.
|
Filter |
Exposure | Count | Binning |
| Luminance | (none) | ||
| Red | 35 min | 5 x 7 min | 1x1 |
| Green | 35 min | 5 x 7 min | 1x1 |
| Blue | 70 min | 10 x 7 min | 1x1 |
Previous version Taken at the ARGO site on 7/1/2000.
The above image is an LRGB composite taken at f/6.3 on the 12" LX200 and ST-8E. Six 1 minute 2x2 binned luminance, five 1 minute 2x2 binned red, five 1 minute 2x2 binned green, five 1 minute 2x2 binned blue. All exposures were unguided. Color balance was by my calibration data of 1.00 : 0.88 : 1.82.